Pattern—Solutions of Hydrochloric Acid in Solvents. 329 
and containing phosphorous pentoxide and dry pumice, and 
finally condensed by a freezing mixture of ice and salt in a 
glass bottle with a double stop-cock ground in. The dry metals 
scraped bright had been placed in this dried bottle and allowed 
to stand in connection with the phosphorous pentoxide drying 
tubes for six hours before the ethyl chloride was distilled in 
upon them. The HOI was dried through two sulphuric acid 
wash bottles, one calcium chloride tower, and two phosphorous 
pentoxide towers (of the dimensions given in the first paragraph 
under the head “experimental”), four eight-ounce wide-mouth 
bottles, and three six inch calcium chloride tubes all filled with 
phosphorous pentoxide. When the HC1 was run into the ethyl 
chloride zinc was rapidly tarnished, a white coating, undoubt¬ 
edly ZnC'l 2 formed, and a steady evolution of gas was observed. 
Lead was corroded to a marked degree, but no gas was evolved. 
Tin was covered with a white coating—SnCl 2 . Magnesium was 
blackened in spots but no evolution of gas was observed for one 
hour, when minute bubbles began to come off, and at the end of 
eleven hours the magnesium was very considerably corroded. 
Aluminum was first merely corroded, but after ten minutes an 
evolution of gas began which was steadily maintained. Dtiring 
the first two hours manganese, chromium, silver, antimony, and 
copper remained bright but the next day after eleven hours had 
elapsed, pink CrC'l 3 appeared on the chromium; manganese was 
covered with a dark coating; antimony was slightly darkened; 
silver was black in spots; and copper had a very slight tarnish, 
such that its lustre was merely dimmed. Shortly after running 
in the HC1, iron began to corrode red (FeCl 3 ) in spots but no 
gas was evolved. Cadmium also was corroded white. Cobalt 
was tarnished but no action whatever was observed upon nickel. 
Arsenic, bismuth, gold, palladium, platinum and tellurium re¬ 
mained perfectly bright after standing eleven hours. Wither- 
ite and calcite were not attacked by the HC1 solution in ethyl 
chloride. 
The conductivity of the ethyl chloride and of a saturated so¬ 
lution of HC1 in ethyl chloride was tested as follows:—Ethyl 
